改进相关法对震相初至的拾取
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摘要
初至时间的自动拾取是微地震数据处理的一个关键环节。地震道之间具有一定的相似性,但相似程度有限,所以用传统的相关法求取初至时,常会因为道与道之间的相似性不足而产生初至拾取上的偏差。基于此,提出改进的相关法,即通过抽样函数构造参考道时窗。该方法克服了传统方法过于依赖道间相似性的缺点。最后将该方法应用到实际数据中,得到很好的效果。
Automatic picking seismic first break is a critical part of seismic data processing. There are some similarities between microseismic signals which not exactly, errors may come from lack of similarities in picking seismic first break. Based on this, the traditional correlation method was improved, that is creat a reference trace through sample function. This method overcomes the faults of traditional methods which rely too much on similarity between traces. Finally, the method is applied to the factual data and gets a better outcome.
Automatic picking seismic first break is a critical part of seismic data processing. There are some similarities between microseismic signals which not exactly, errors may come from lack of similarities in picking seismic first break. Based on this, the traditional correlation method was improved, that is creat a reference trace through sample function. This method overcomes the faults of traditional methods which rely too much on similarity between traces. Finally, the method is applied to the factual data and gets a better outcome.
引文
[1]谭玉阳,何川,曹耐.基于多道相似系数的微地震事件自动识别[J].石油物探,2015,54(2):126-132.
[2]潘树林,高磊,陈辉,等.可控震源地震记录初至拾取方法研究[J].石油物探,2010,49(2):209-212,18.
[3]徐钰,曾维辉,宋建国,等.浅层折射波勘探中初至自动拾取新算法[J].石油地球物理勘探,2012,47(2):218-224,181.
[4]刘劲松,王赟,姚振兴.微地震信号到时自动拾取方法[J].地球物理学报,2013,56(5):1 660-1 666.
[5]宋维琪,杨勤勇,郭全仕,等.地面微地震资料弱信号提取方法研究[J].石油物探,2013,52(2):131-135,111.
[6]陈金焕,曹永生,孙成龙,等.基于二分法的地震波初至自动拾取算法[J].地球物理学进展,2015,30(2):688-694.
[7]吕世超,宋维琪,刘彦明,等.利用偏振约束的能量比微地震自动识别方法[J].物探与化探,2013,37(3):488-493.
[2]潘树林,高磊,陈辉,等.可控震源地震记录初至拾取方法研究[J].石油物探,2010,49(2):209-212,18.
[3]徐钰,曾维辉,宋建国,等.浅层折射波勘探中初至自动拾取新算法[J].石油地球物理勘探,2012,47(2):218-224,181.
[4]刘劲松,王赟,姚振兴.微地震信号到时自动拾取方法[J].地球物理学报,2013,56(5):1 660-1 666.
[5]宋维琪,杨勤勇,郭全仕,等.地面微地震资料弱信号提取方法研究[J].石油物探,2013,52(2):131-135,111.
[6]陈金焕,曹永生,孙成龙,等.基于二分法的地震波初至自动拾取算法[J].地球物理学进展,2015,30(2):688-694.
[7]吕世超,宋维琪,刘彦明,等.利用偏振约束的能量比微地震自动识别方法[J].物探与化探,2013,37(3):488-493.